
.img {
    width: 350px;
    height: 350px;
    background-image: url(./imgs/1.jpg);

    position: relative;
}
.img .mask {
    position: absolute;
    left:0;
    top: 0;

    width: 50px;
    height: 50px;
    background-color: pink;
    opacity: .5;

    display: none;
}
.enlarge {
    /*
    width: 700px;
    height: 700px;
    */
    width: 100px;
    height: 100px;
    background-image: url(./imgs/1.big.jpg);
    background-repeat: no-repeat;
    background-position: 0 0 ;
    display: none;
}